AndroidJavaObject.Call数组传递错误(适用于Android的Unity) [英] AndroidJavaObject.Call array passing error (Unity for Android)

问题描述

我正在开发使用Android本机插件的Unity for Android应用程序.在其中，我使用AndroidJavaObject的Call方法.

文档中所述，方法的签名为:

public void Call(string methodName, params object[] args);

我想将字符串数组发送到我的项目中:

string[] strings = new string[] { "string1", "string2", ...};
myAndroidJavaObject.Call("myMethod", strings);

并将其接收到Java代码中:

public void myMethod(String[] strings){
    // some code where I use strings
}

但是我收到错误消息:

AndroidJavaException: java.lang.NoSuchMethodError: no non-static method with name='myMethod' signature='(Ljava/lang/String;Ljava/lang/String;)V' in class Ljava.lang.Object;

在这种情况下，谁能描述程序的行为?

解决方案

将数组发送到AndroidJavaObject时需要特殊处理.取自本文，您可以实现可以像这样处理它的功能:

private AndroidJavaObject javaArrayFromCS(string [] values) {
    AndroidJavaClass arrayClass  = new AndroidJavaClass("java.lang.reflect.Array");
    AndroidJavaObject arrayObject = arrayClass.CallStatic<AndroidJavaObject>("newInstance", new AndroidJavaClass("java.lang.String"), values.Count());
    for (int i=0; i<values.Count(); ++i) {
        arrayClass.CallStatic("set", arrayObject, i, new AndroidJavaObject("java.lang.String", values[i])));
    }

    return arrayObject;
}

然后您可以像这样调用函数:

myAndroidJavaObject.Call("myMethod", javaArrayFromCS(strings));

I'm working on Unity for Android application, which uses native Android plugin. Inside of it I use AndroidJavaObject's Call method.

As it says in documentation, signature of method is:

public void Call(string methodName, params object[] args);

I want to send array of strings into my project:

string[] strings = new string[] { "string1", "string2", ...};
myAndroidJavaObject.Call("myMethod", strings);

And receive it into Java code:

public void myMethod(String[] strings){
    // some code where I use strings
}

But I receive error:

AndroidJavaException: java.lang.NoSuchMethodError: no non-static method with name='myMethod' signature='(Ljava/lang/String;Ljava/lang/String;)V' in class Ljava.lang.Object;

Can anyone describe program's behavior in this situation?

解决方案

Arrays require special treatment when being sent to an AndroidJavaObject. Taken from this article, you can implement a function that will handle it like so:

private AndroidJavaObject javaArrayFromCS(string [] values) {
    AndroidJavaClass arrayClass  = new AndroidJavaClass("java.lang.reflect.Array");
    AndroidJavaObject arrayObject = arrayClass.CallStatic<AndroidJavaObject>("newInstance", new AndroidJavaClass("java.lang.String"), values.Count());
    for (int i=0; i<values.Count(); ++i) {
        arrayClass.CallStatic("set", arrayObject, i, new AndroidJavaObject("java.lang.String", values[i])));
    }

    return arrayObject;
}

You can then call into your function like this:

myAndroidJavaObject.Call("myMethod", javaArrayFromCS(strings));

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